I've hooked up my PAL TV via a VGA->SCART RGB cable.<br><br>I use an X modeline with the "interface" flag that results in a mode with 25hz FRAME rate which is 50 hz FIELD rate.<br><br>Playing some interlaced files without deinterlace (but with OpenGL video sync, and video as a time base) results in the fields being shown out of order. (other files work OK) or to a 25FPS playback rather than pseudo 50hz (see my "What don't I get here" posts)
<br><br>So as recommended I enable bob-deinterlace.....<br><br><br>2007-06-20 23:04:08.802 The realtime priority setting is not enabled.<br>2007-06-20 23:04:08.815 Using deinterlace method bobdeint<br>2007-06-20 23:04:08.920
nVidiaVideoSync: VBlank ioctl did not work, unimplemented in this driver?<br>2007-06-20 23:04:08.921 DRMVideoSync: Could not open device /dev/dri/card0, No such file or directory<br>2007-06-20 23:04:08.926 OpenGLVideoSync: GLX extensions: GLX_EXT_visual_info GLX_EXT_visual_rating GLX_SGIX_fbconfig GLX_SGIX_pbuffer GLX_SGI_video_sync GLX_SGI_swap_control GLX_EXT_texture_from_pixmap GLX_ARB_multisample GLX_NV_float_buffer GLX_ARB_get_proc_address
<br>2007-06-20 23:04:08.928 OpenGLVideoSync: x,y -> 360, 288<br>2007-06-20 23:04:09.023 Using OpenGLVideoSync<br>2007-06-20 23:04:09.023 Set video sync frame interval to 40000<br>2007-06-20 23:04:09.024 Video sync method can't support double framerate (refresh rate too low for bob deint)
<br>2007-06-20 23:04:09.024 Set video sync frame interval to 40000<br>2007-06-20 23:04:09.035 Using deinterlace method onefield<br>2007-06-20 23:04:09.045 Using video as timebase<br>2007-06-20 23:04:09.045 Video timing method: SGI OpenGL
<br>2007-06-20 23:04:09.045 Refresh rate: 40013, frame interval: 40000<br>'video_output' mean = '40538.84', std. dev. = '16889.77', fps = '24.67'<br><br><br>Notice the line......<br><br>2007-06-20 23:04:
09.024 Video sync method can't support double framerate (refresh rate too low for bob deint)<br>
<br>To me this looks like Myth has seen that the mpeg is at 25FPS, <br>has looked at the video mode and seen 25FPS also,<br>but bob-deinterlace effectively doubles the rate to 50, oh dear we don't support that....use onefield instead....
<br>WRONG in this case!!<br>We are using an ****INTERLACED**** mode so we can support the full 50hz just at half the vertical resolution!<br><br>So yes it looks like Viktor's patch is correct after all....<br><br>Now to do my first compile of Mythtv....
<br><br>Cheers<br><br>Steve<br><br><br><br><br><div><span class="gmail_quote">On 15/06/07, <b class="gmail_sendername">Viktor Avramov</b> <<a href="mailto:drvik@bigpond.net.au">drvik@bigpond.net.au</a>> wrote:</span>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I recommend using a VGA -> SCART cable... then you will have very precise<br>control of what goes to the TV.... I had a problem like you using PAL 25FPS
<br>on a 50Hz interlaced TV... I wrote a patch which doubles the framerate for<br>interlaced modes... I now use it wil BOB deinterlacing and the result is<br>silky smooth!<br><br>Here's the patch.... do with it what you will... I submitted it for inclusion
<br>in trunk but it was rejected because it's flawed in it's logic... all I can<br>say is on my setup it's the only way of getting smooth, fluid motion.... the<br>devs told me to use the myth-vid branch instead!!
<br><br>Viktor<br><br><br>Index: libs/libmythtv/videoout_xv.cpp<br>===================================================================<br>--- libs/libmythtv/videoout_xv.cpp (revision 12477)<br>+++ libs/libmythtv/videoout_xv.cpp (working copy)
<br>@@ -308,6 +308,9 @@<br> if (rate == 0)<br> rate = 60;<br><br>+ if (mode_line.flags && 0x010) // #define V_INTERLACE 0x010<br>+ rate = rate * 2; // if modeline is interlaced then double
<br>the effective refresh rate<br>+<br> if (rate < 20 || rate > 200)<br> {<br> VERBOSE(VB_PLAYBACK, LOC + QString("Unreasonable refresh rate %1Hz "<br>_______________________________________________
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